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The Homeland Security Department said Tuesday it arrested 192 people along the Mexican border in South Texas on immigrant-smuggling charges and seized more than $625,000, part of the Obama administration's efforts to discourage and disrupt the flood of tens of thousands of people crossing the border illegally.

The arrests, which took place under a crackdown called "Operation Coyote," took place over the last month and were part of a 90-day effort targeting smuggling groups.

The White House has complained that smugglers are exploiting U.S. policies that, in practice, allow Central American kids to stay for years or indefinitely once they arrive, and it has proposed increasing penalties for smugglers.

U.S. Immigration and Customs Enforcement said it also took into custody 501 immigrants in the country illegally. It said it seized the money from 228 bank accounts held by suspected human- and drug-smuggling groups.

The Rio Grande Valley in South Texas is the Border Patrol's busiest spot along the Mexico border. Border agents have arrested more than 200,000 border crossers in the area some October 1.

The majority of the more than 57,000 child immigrants caught crossing the border without their parents or a guardian have also been taken into custody in the area.